Is a person considered a killer if they suspect they are infected with AIDS and are negligent in taking precautions to prevent transmitting the infection to others, knowing that their negligence could infect hundreds? And does the ruling of one who killed 99 souls apply to them? What is the Islamic legal advice for such a case?

We advise you to stay away from obsessive thoughts (waswasah) which spoil your life and make you consider yourself a murderer when you are not. And by consulting doctors, you may not be infected. It is essential for an infected person to take precautions against transmitting the infection, due to His saying: "There shall be no harm nor reciprocating harm."